Benjamin p



(No Model.)

B. P. FIELD.

- CHIMNEY GAP. No. 289,636. Patented Dec. 4, 1883.

UNITED STATES BAT NT Orrrcn.

BENJAMIN P. FIELD, OF BABYLON, NEW YORK.

CHIMNEY-CAP.

SPECIFICATION forming part of Letters Patent No. 289,636, dated December4, 1883.

Application filed J une 11, 1883. (No model.)

To all whom it may concern.-

Be it known that I, BENJAMIN P. FIELD, a citizen of the United States ofAmerica, residing at Babylon, in the county of Suffolk and State of NewYork, have-invented certain new and useful Improvements in Chimney-Gaps;and I do hereby declare the following to be a full,'clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to letters or figures of referencemarked thereon, which form a part of this specification.

This invention relates to certain new and useful improvements inchimney-caps, its object being to provide a means whereby a downwarddraft is prevented in the chimney, and which will afford protection, sothat rain cannot beat into the same; and to this end my inventionconsists in a chimney cowl or cap, which is adapted to be secured to thechimney, and is provided with a box having open ends, the top of saidbox being longer than the lower side, so as to project over the same,and in providing the upper part with two upright openings, as will behereinafter more fully set forth, and pointed out in the claims.

In the annexed drawings, which illustrate my invention, Figure 1 is aperspective View, showing the same applied to a chimney; and Fig. 2 is avertical longitudinal section.

A represents a chimney, which is provided with the usual opening, overwhich is secured my improved cap, which is provided with a collar, B,which extends into the chimney and upward through the base of the cap.This cap is preferably rectangular in cross-sections, and is providedwith sides 0 G, which taper from the base upwardly, and are connected toeach other by a horizontal top, 0, which is of sufficient length toextend over the base. This top 0 is provided with two cylindrical (orother shaped, if preferable) outlets, D D, which extend upwardly fromthe top 0. It will be seen that by this construction the cap is providedwith a straight passage way through the same, and is also provided witha projecting top,which will prevent rain from beating into the smoke-passage in the chimney.

The outlets D D are located near the ends of the top 0, so that theywill not be over the collar or inlet B, which collar projects slightlyinwardly above the base of the cap. This upwardly-projecting portion ofthe collar will prevent rain from finding access to the smokepassage inthe chimney. By thisarrangement of the cap the rain is not onlyprevented from finding access to the smoke passage in the chimney, butthe draft is increased and the wind is prevented from blowing down thechimney. When the wind blows from a direction on a line from thehorizontal opening in this chimney-cap, the draft will be increased bythe passage of the wind over the collar B, as indicated by the arrows 11 and the arrows 2 2, respectively. When there is a downdraft, it willtake a course indicated by the arrows 3 3, and will be prevented fromcausing a downdraft in the chimney. The updraft from the outside of thecap will also pass through the openings D D. Ordinarily the smoke orproducts of combustion will pass out of these openings D D. When thewind. is blowing in an opposite direction from the horizontal openingsin the cap, it will increase the draft, as the current passing over thetop of the openings D D and past the sides of the horizontal openingswill carry the smoke with it.

I am aware that prior to my invention chimneys were provided with capswhich have been bent so as to extend horizontally over the same, and Ido not claim such, broadly, as my invention; but

WVhat I claim as new, and desire to secure by Letters Patent, is

1. A chimney-cap having a horizontal opening, as shown, a top of greaterlength than its base, and openings D D in said top, substantially as andfor the purpose set forth.

2. A chimney-cap consisting of an inlet-passage, B, which extends abovethe base, said base being provided with tapering sides 0 O and a top ofgreater length than the base, and openings D D, located adjacent to theends of the top, the parts being organized substantially as shown.

In testimony whereof I affix my signature in presence of two witnesses.

BENJAMIN P. FIELD.

Witnesses:

BENJ. B. W001), Brcnn. HIGBIE, Jr.

